The setTokenPrice function allows the owner to arbitrarily change the token price, creating a centralization risk. Without restrictions, the owner can inflate or decrease the price at will, leading to unfair purchases, price manipulation, or rug pulls. To mitigate this, price change limits (e.g., max ±10% per update) should be implemented. Alternatively, integrating a trusted oracle (e.g., Chainlink) ensures decentralized pricing. Another safeguard is requiring multi-signature approval or community governance before price updates. These measures prevent owner abuse, ensuring fairness and transparency in token purchases while maintaining buyer trust.

The withdrawUnsoldTokens function allows the owner to withdraw unsold tokens at any time, even while the presale is still ongoing. This creates a centralization risk where the owner can manipulate token supply, potentially reducing available tokens and harming investors. Without restrictions, tokens could be withdrawn mid-sale, impacting buyer confidence. To mitigate this, a condition should be added to ensure withdrawals occur only after the presale ends. Implementing multi-signature approvals and transparent event logging can further prevent misuse. These measures enhance security and protect investors from potential manipulation by ensuring fair token distribution throughout the presale process.

Allowing the owner to update presale times mid-sale poses risks such as market manipulation, investor uncertainty, and potential exit scams. The owner could extend or shorten the presale based on market conditions, impacting early investors and creating mistrust. Abruptly ending the sale may prevent participation while still retaining control over funds. Additionally, preferential treatment for certain investors could lead to unfair token distribution. To mitigate these risks, updates should be restricted before the presale starts, require community approval, set change limits, and ensure transparency through event emissions, protecting investors from sudden and unfair changes.

Allowing the owner to update purchase limits mid-sale introduces risks of unfair restrictions or preferential treatment. The owner could increase the minimum purchase amount, preventing small investors from participating, or lower the maximum limit, capping investments arbitrarily. This could manipulate demand, limit access for certain buyers, or enable insider advantages. Investors expecting stable conditions might be negatively impacted by sudden changes. To mitigate these risks, updates should only be allowed before the presale starts, require a time lock before activation, or be governed by a decentralized mechanism ensuring fair and transparent changes.